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<h1 class="topictitle1">手动执行备份</h1>
<div><p>当您需要立即执行一次备份任务时，可以通过手动备份实现。</p>
<div class="section"><h4 class="sectiontitle">背景信息</h4><ul><li>手动备份时，SLA中定义的参数（<span class="uicontrol">“<span>失败后自动重试</span>”</span>除外）会应用到手动备份任务中。</li><li>手动备份产生的副本保留时长按照SLA中定义的保留时长进行保留。<p>如果手动备份时选择的保护策略未在SLA中定义，则产生的备份副本保留时长为永久保留。如SLA中未定义全量备份，而手动备份时选择的是全量备份，则本次手动全量备份产生的副本保留时长为永久保留。</p>
</li><li>如果SLA定义了复制策略或归档策略，则执行手动备份时，系统会按照SLA的定义执行一次复制或归档。</li></ul>
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<div class="section"><h4 class="sectiontitle">注意事项</h4><ul id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_ul11489174014141"><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li15489104013147">请确保生产存储已预留用于备份的快照空间，快照预留空间=源LUN数据量*备份周期内数据变化量百分比。默认情况下，建议预留源LUN容量的20%用于创建快照。</li><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li753614613148">弹性云服务器处于以下状态时支持备份：“运行中 ”、“正在开机”、“正在关机 ”、“关机”、“重装操作系统中”、“重装操作系统失败”、“切换操作系统中”、“切换操作系统失败”。</li><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li3646173183411">备份时，每个ProtectAgent的并发任务数默认为20，不建议修改此并发数，否则可能出现扫盘失败进而导致备份失败的问题。</li><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li1469271831514">如果华为分布式块存储上的弹性云服务器/云硬盘迁移到了SAN存储，执行弹性云服务器/云硬盘备份前，需要先将SAN存储资源添加到<span id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_text62648572215">OceanProtect</span>中。注册操作请参见<a href="zh-cn_topic_0000001839194633.html">步骤2：注册华为云Stack</a>中的<a href="zh-cn_topic_0000001839194633.html#ZH-CN_TOPIC_0000001839194633__li89549137399">3</a>。</li><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li999215138588">首次备份前，请先完成资源扫描，以便系统显示最新的弹性云服务器信息，具体操作请参见<span id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_cite390161214149">《OceanProtect <span id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_zh-cn_topic_0000001792502994_ph19170214112011">备份一体机 1.5.0-1.6.0</span> ProtectAgent安装指南》</span>中的“管理代理主机”章节。</li><li id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001792395516_li412153019411">如果备份任务异常，导致快照删除失败，当下一次执行全量备份任务时，系统会自动删除无用的快照。</li></ul>
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<div class="section"><h4 class="sectiontitle">操作步骤</h4><ol><li><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001839194633_zh-cn_topic_0000001839142377_uicontrol23517341412">“<span id="ZH-CN_TOPIC_0000001839274581__zh-cn_topic_0000001839194633_zh-cn_topic_0000001839142377_text635183444114">保护</span> &gt; 云平台 &gt; 华为云Stack”</span>。</span></li><li><span>根据需要备份的类型，选择<span class="uicontrol">“<span>项目/资源集</span>”</span>、<span class="uicontrol">“<span>云服务器</span>”</span>页签。</span><p><div class="note"><img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span><div class="notebody"><p>选择<span class="uicontrol">“<span>项目/资源集</span>”</span>进行备份时，仅会备份与<span class="uicontrol">“<span>项目/资源集</span>”</span>SLA相同的弹性云服务器，不会备份与项目/资源集SLA不同的弹性云服务器。</p>
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</p></li><li><span>在需要备份的项目/资源集或弹性云服务器所在行右侧，单击<span class="uicontrol">“<span>更多</span> &gt; <span>手动备份</span>”</span>。</span><p><div class="note"><img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span><div class="notebody"><ul><li>如果系统未显示需要保护的项目/资源集或弹性云服务器，请先单击界面左侧区域的<span class="uicontrol">“<span>更多</span> &gt; <span>资源扫描</span>”</span>，更新资源信息。</li><li>支持选择多个资源批量进行手动备份。勾选多个资源，在资源上方区域选择<span class="uicontrol">“<span>更多</span> &gt; <span>手动备份</span>”</span>。</li></ul>
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</p></li><li><span>设置手动备份产生的副本名称。</span><p><p>如果您不设置，系统默认设置副本名称为：backup_时间戳。</p>
</p></li><li><span>选择保护策略：<span>全量备份</span>或<span>永久增量（合成全量）备份</span>。</span></li><li><span>单击<span class="uicontrol">“<span>确定</span>”</span>。</span></li></ol>
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<div class="parentlink"><strong>父主题：</strong> <a href="zh-cn_topic_0000001839274597.html">步骤7：执行备份</a></div>
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